Hello
sin ..... | 0° |30°|45°|60°|90°|
...........| 0...| 1..| 2..| 3..| 4..| write numbers
...........| 0...| 1..|√2.| √3 | 2..| take root square
...........| 0...|1/2|√2/2|√3/2|1| divide by 2
...........| 0...|1/2|√2/2|√3/2|1| .....
cos.....| 90°|60°|45°|30°| 0°|
sin (75°)
=sin(30°+45°)=sin 30°*cos 45° +cos 30°*sin 45°
.................... =1/2*√2/2 + √3/2*√2/2
.................... = √2(1+√3)/4
cos 75°
=cos(30°+45°)=cos 30°*cos 45°-sin 30°*cos 45°
=√3/2*√2/2-1/2*√2/2
=√6/4-√2/4=√2/4*(√3 -1 )
Answer:
y=1.3 x - 0.21
Step-by-step explanation:
![y = (slope) \times x + (constant)](https://tex.z-dn.net/?f=y%20%3D%20%28slope%29%20%5Ctimes%20x%20%2B%20%28constant%29)
set (-2.3,-3.2) in above
![- 3.2 = 1.3 \times ( - 2.3) + c](https://tex.z-dn.net/?f=%20-%203.2%20%3D%201.3%20%5Ctimes%20%28%20-%202.3%29%20%2B%20c)
then c=-0.21
Answer:
maybe 5250
Step-by-step explanation:
i think
Yes it is true because if 3x +15=2x+60 it is true
Answer:
20
Step-by-step explanation:
25 + 7x = 165
25 + 7(20) = 165
25 + 140 = 165